Milwaukee 3109-24 Operator's Manual page 5

Removing the Chuck from the Right Angle Drive Unit (Fig. 3)
Fig. 3
The chuck can be removed from the right angle drive unit in the same
manner it is removed from the drill; however, ALWAYS REMOVE RIGHT
ANGLE DRIVE FROM THE DRILL BEFORE ATTEMPTING TO LOOSEN
THE CHUCK. This will prevent damaging the drill's gearing. Use the open
end wrench provided to hold the right angle drive spindle before attempt-
ing to loosen the chuck.
Selecting Bits
When selecting a bit, use the right type for your job. For best perfor-
mance, always use sharp bits.
Drilling
1. Before drilling, be sure the workpiece is clamped securely. Use back-
ing material to prevent damage to the workpiece during breakthrough.
2. When starting a hole, place the drill bit on the work surface and
apply firm pressure. Begin drilling at a slow speed, gradually increas-
ing the speed as you drill.
3. Always apply pressure in line with the bit. Use enough pressure to
keep the drill biting, but do not push hard enough to stall the motor.
4. Reduce pressure and ease the bit through the last part of the hole.
While the tool is still running, pull the bit out of the hole to prevent
jamming.
Drilling in Wood, Composition Materials and Plastic
When drilling in wood, composition materials and plastic, start the drill
slowly, gradually increasing speed as you drill. When drilling into wood,
use wood augers or twist drill bits. Always use sharp bits. When using
twist drill bits, pull the bit out of the hole frequently to clear chips from the
bit flutes. To reduce the chance of splintering, back work with a piece of
scrap wood. Select low speeds for plastics with a low melting point.
Removing the Chuck from the Drill (Fig. 4)
1. To remove the left-hand screw inside the chuck, remove the battery
pack from the tool and open the chuck jaws. Insert a T-handle hex
key into the screw inside the chuck. Turn the T-handle hex key and
remove the screw. Save the screw for installing your new chuck.
2. To remove chuck: Tighten a large hex key into the chuck. Place the
chuck on a workbench as shown. Strike the hex key with a soft-headed
mallet to loosen the chuck. Remove the chuck by hand.
APPLICATIONS
Drilling in Metal
When drilling in metal, use high speed steel twist drills or hole saws. Use
a center punch to start the hole. Lubricate drill bits with cutting oil when
drilling in iron or steel. Use a coolant when drilling in nonferrous metals
such as copper, brass or aluminum. Back the material to prevent binding
and distortion on breakthrough.
Drilling in Masonry
When drilling in masonry, use high speed carbide-tipped bits. Drilling soft
masonry materials such as cinder block requires little pressure. Hard
materials like concrete require more pressure. A smooth, even flow of
dust indicates the proper drilling rate. Do not let the bit spin in the hole
without cutting. Do not use water to settle dust or to cool bit. Both actions
will damage the carbide.
Driving Screws
When driving screws, use the proper screwdriver bit for your job. After
drilling pilot and shank holes, start the screw slowly and increase the
speed as driving progresses. Set the screw by slowing to a stop. Do not
run screws down at excessive speeds. To remove screws, reverse the
motor.
Fig. 4
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